Spoiler

Yoo Ah In appeared in episode 13 as a bank worker who firmly rejects Kang Mo Yeon’s (played by Song Hye Kyo) request for a loan. His character’s name is actually Eom Hong Sik, which is Yoo Ah In’s real name. The actor agreed to make a cameo as a surprise birthday present for Song Hye Kyo.

His scene was only 40 seconds, but received a fervent response from viewers.

Meanwhile, “Descendants of the Sun” is quickly approaching the end! Watch it all over again starting with the first episode below: